20 CALIFORNIA ACADEMY OF SCIENCES. 



Untersuchunger liber Trilobiten. Zweites 



Stuck als Fortsetzung zu der Abhandlung " Ueber einige 

 bohmische Trilobiten." Berlin, 1846, 3 pis. 



Harpides n. g. Cheirurus gibbus Beyr., C. exsuln. sp., C. ornatus~Dalm. 

 Sphcerexochus n. sp. ? S. mirus Beyr., (S. beyrichi Lindstom), pi. 1, fig. 

 9. Lichas laciniata u. sp., L. angusta n. sp., L. tricuspidata n. sp., L. 

 scabra n. sp. Arges armatus Gold., A. speciosus Beyr., A. anglicus n. sp. 

 Bronteus campanifer Beyr., B. palifer Beyr., B. pendnlus, B. insignitus 

 Eomer. Odontopleura ovata Emm., 0. mutica Emm., 0. inermis n. sp., 

 0. brightii Murch., 0. cornuta n. sp., 0. vesiculosa n. sp. Calymene dia- 

 demata~Ba,rT., C. parvula Barr., C. pulchra Barr. Proetus concinnus, P. 

 cornutus. Trinucleus ornatus Sternb. Harpes ungula Sternb. Harpides 

 hospes n. sp. Staurocephalus murchisoni. 



Ueber Leaia leiclyi. 



In Zeitsch. Deutsch. geol. Gessel. vol. 16, 1864, p. 363. 



Bigsby (J. J.) A sketch of the Geology of the Island 

 of Montreal. 



In Annals Lye. Nat. His. N. Y. vol. 1, 1825, p. 198. 



The author figures a trilobite (Trinucleus concentricus) pi. 15, fig. 1. 



Bigsby (J. J.) Description of a new species of Trilo- 

 bite. 



In Jour, Acad. Nat. Sc. Phila., vol. 4, pt. 2, 1825, p. 365, pi. 23. 

 Paradoxides boltoni (Lichas boltoni). 



Thesaurus Siluricus. The flora and fauna of 



the Silurian period. London, 1868. 



Billings (E.) Fossil foot prints. 



In Canadian Naturalist, vol. 1, 1856, p. 35, wood cuts. 

 Protichnites septem-notatus. 



On some of the characteristic fossils of the 



Lower Silurian rocks of Canada. 



In Canadian Naturalist, vol. 1, 1856, p. 39, 11 wood cuts. 

 The author figures Isotelus gigas, Calijmene senaria, and the hypostoma 

 of Isotelus gigas. 



Fossils of the Upper Silurian rocks, Niagara 



and Clinton goups. 



In Canadian Naturalist, vol. 1, 1856, p. 57, 1 pi. 

 Phacops limulurus Green. 



